The Nasdaq bolted 0.9%. The S&P 500 and the Dow Jones industrial average gained 0.5% each. Volume was down 6% on the Nasdaq and 10% lower on the NYSE compared with Thursday morning's action.

The stock market today opened with the major indexes showing modest losses for the week. But the Nasdaq, Dow and S&P 500 quickly turned positive and were tracking toward a sixth straight weekly gain.

Wholesale inventories tightened 0.1% in December, according to Commerce Department data. That compared with a downwardly revised 0.4% expansion in November and was less than the 0.4% increase expected. Tighter inventories mean industries are actively moving more product than they are purchasing to restock supplies.

In stocks, LinkedIn (LNKD) spiked 17% at the open. The social networking site for professionals reported a big fourth-quarter win late Thursday.

CommVault Systems (CVLT) bolted 4% in hefty trade after four straight down days. Standard & Poor's announced late Thursday the stock would join the S&P MidCap 400 index. The date for the change was not announced. The move put CommVault 3% below its Feb. 1 high and 10% above a 70.02 buy point.

Biogen (BIIB) jumped 3% in early action after test results showed positive effects from an injectable hemophilia treatment. The biotech stock is up 5% in a fourth straight week of gains, just below Wednesday's high and 7% past a 155.40 buy point.

We're now in the thick of earnings season, and unanticipated reactions to company results have kept investors on their toes. Today's Screen of the Day is Rising Estimates, which looks at stocks that have the greatest increase in earnings estimate revisions. That means analysts are betting on strong ...

LinkedIn reported better-than-expected Q2 earnings after the market close Thursday, but the stock reversed downward after an initial spike in after-hours trading. LinkedIn (NYSE:LNKD) reported Q2 revenue of $711.7 million, beating the consensus estimate of $680 million and up 33% from the ...

07/30/2015 06:59 PM ET

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Stocks ended modestly lower in a choppy session Friday, but still ended higher on the week. The Nasdaq lost a fraction, while the S&P 500 edged down 0.2%. Hurt by losses in Chevron (NYSE:CVX) and ExxonMobil (NYSE:XOM), the Dow Jones industrial average fell 0.3%. Both oil giants reported lackluster ...

Stocks weakened and turned mixed in late trading Friday. But they were still on track to end higher for the week. The Nasdaq trimmed a 0.5% gain to 0.1%. The S&P 500 slipped 0.2% after being up nearly 0.3%. The Dow Jones industrial average was off 0.4%, hurt by Chevron (NYSE:CVX) and Exxon ...

The major averages extended their gains slightly in early afternoon trading Friday as earnings reports continued to dominate stock action. The Nasdaq was up 0.4% and the S&P 500 0.2%, while the Dow Jones industrial average tried to hold a fractional gain. Volume was tracking lower across the ...

Stocks were higher going into the lunch hour Friday, as a four-day Nasdaq rally and upbeat earnings reports kicked up a round of fresh breakouts. The Nasdaq rose 0.3%, the S&P 500 climbed 0.2% and the Dow Jones industrial average gained 0.1% in the stock market today. Despite a ragged market ...

Stocks fought in tightly mixed action early Friday, with earnings news and economic data powering a large share of the action. The Nasdaq improved 0.2% and the S&P 500 rose 0.1%, while the Dow Jones industrial average struggled with a 0.1% decline. Volume was soft, down 23% on the Nasdaq and 8% ...

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